//// Copyright (C) 2004-2021 Artifex Software, Inc.
////
//// This file is part of MuPDF.
////
//// MuPDF is free software: you can redistribute it and/or modify it under the
//// terms of the GNU Affero General Public License as published by the Free
//// Software Foundation, either version 3 of the License, or (at your option)
//// any later version.
////
//// MuPDF is distributed in the hope that it will be useful, but WITHOUT ANY
//// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
//// FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
//// details.
////
//// You should have received a copy of the GNU Affero General Public License
//// along with MuPDF. If not, see <https://www.gnu.org/licenses/agpl-3.0.en.html>
////
//// Alternative licensing terms are available from the licensor.
//// For commercial licensing, see <https://www.artifex.com/> or contact
//// Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
//// CA 94129, USA, for further information.
//
//#include "mupdf/fitz.h"
//
//#include <string.h>
//
//void
//fz_save_pixmap_as_psd(fz_context *ctx, fz_pixmap *pixmap, const char *filename)
//{
//	fz_output *out = fz_new_output_with_path(ctx, filename, 0);
//	fz_band_writer *writer = NULL;
//
//	fz_var(writer);
//
//	fz_try(ctx)
//	{
//		writer = fz_new_psd_band_writer(ctx, out);
//		fz_write_header(ctx, writer, pixmap->w, pixmap->h, pixmap->n, pixmap->alpha, pixmap->xres, pixmap->yres, 0, pixmap->colorspace, pixmap->seps);
//		fz_write_band(ctx, writer, pixmap->stride, pixmap->h, pixmap->samples);
//		fz_close_band_writer(ctx, writer);
//		fz_close_output(ctx, out);
//	}
//	fz_always(ctx)
//	{
//		fz_drop_band_writer(ctx, writer);
//		fz_drop_output(ctx, out);
//	}
//	fz_catch(ctx)
//	{
//		fz_rethrow(ctx);
//	}
//}
//
//void
//fz_write_pixmap_as_psd(fz_context *ctx, fz_output *out, const fz_pixmap *pixmap)
//{
//	fz_band_writer *writer;
//
//	if (!out)
//		return;
//
//	writer = fz_new_psd_band_writer(ctx, out);
//
//	fz_try(ctx)
//	{
//		fz_write_header(ctx, writer, pixmap->w, pixmap->h, pixmap->n, pixmap->alpha, pixmap->xres, pixmap->yres, 0, pixmap->colorspace, pixmap->seps);
//		fz_write_band(ctx, writer, pixmap->stride, pixmap->h, pixmap->samples);
//		fz_close_band_writer(ctx, writer);
//	}
//	fz_always(ctx)
//	{
//		fz_drop_band_writer(ctx, writer);
//	}
//	fz_catch(ctx)
//	{
//		fz_rethrow(ctx);
//	}
//}
//
//typedef struct psd_band_writer_s
//{
//	fz_band_writer super;
//	int num_additive;
//} psd_band_writer;
//
//static void
//psd_write_header(fz_context *ctx, fz_band_writer *writer_, fz_colorspace *cs)
//{
//	psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
//	fz_output *out = writer->super.out;
//	int w = writer->super.w;
//	int h = writer->super.h;
//	int s = writer->super.s;
//	int n = writer->super.n;
//	int c = n - writer->super.alpha - s;
//	fz_separations *seps = writer->super.seps;
//	int i;
//	size_t len;
//	static const char psdsig[12] = { '8', 'B', 'P', 'S', 0, 1, 0, 0, 0, 0, 0, 0 };
//	static const char ressig[4] = { '8', 'B', 'I', 'M' };
//	unsigned char *data;
//	size_t size;
//	fz_colorspace *cs_cmyk = cs;
//
//#if FZ_ENABLE_ICC
//	size = fz_buffer_storage(ctx, cs->u.icc.buffer, &data);
//#else
//	size = 0;
//	data = NULL;
//#endif
//
//	if (cs->n != 4)
//		cs_cmyk = fz_device_cmyk(ctx);
//
//	if (!fz_colorspace_is_subtractive(ctx, cs))
//		writer->num_additive = cs->n;
//
//	/* File Header Section */
//	fz_write_data(ctx, out, psdsig, 12);
//	fz_write_int16_be(ctx, out, n);
//	fz_write_int32_be(ctx, out, h);
//	fz_write_int32_be(ctx, out, w);
//	fz_write_int16_be(ctx, out, 8); /* bits per channel */
//
//	switch (c)
//	{
//	case 0:
//	case 1:
//		fz_write_int16_be(ctx, out, 1); /* Greyscale */
//		break;
//	case 3:
//		fz_write_int16_be(ctx, out, 3); /* RGB */
//		break;
//	case 4:
//		fz_write_int16_be(ctx, out, 4); /* CMYK */
//		break;
//	default:
//		fz_write_int16_be(ctx, out, 7); /* Multichannel */
//		break;
//	}
//
//	/* Color Mode Data Section - empty */
//	fz_write_int32_be(ctx, out, 0);
//
//	/* Image Resources Section - Spot Names, Equivalent colors, resolution, ICC Profile */
//	/* Spot names */
//	len = 0;
//	for (i = 0; i < s; i++)
//	{
//		const char *name = fz_separation_name(ctx, seps, i);
//		char text[32];
//		size_t len2;
//		if (name == NULL)
//		{
//			fz_snprintf(text, sizeof text, "Spot%d", i-4);
//			name = text;
//		}
//		len2 = strlen(name);
//		if (len2 > 255)
//			len2 = 255;
//		len += len2 + 1;
//	}
//
//	/* Write the size of all the following resources */
//	fz_write_int32_be(ctx, out,
//			(s ? 12 + ((len + 1)&~1) : 0) +	/* Spot Names */
//			(s ? 12 + (14 * s) : 0) +	/* DisplayInfo */
//			28 +				/* Resolutions */
//			(size ? (size+19)&~1 : 0));	/* ICC Profile */
//
//	/* Spot names */
//	if (s != 0)
//	{
//		fz_write_data(ctx, out, ressig, 4);
//		fz_write_int16_be(ctx, out, 0x03EE);
//		fz_write_int16_be(ctx, out, 0); /* PString */
//		fz_write_int32_be(ctx, out, (len + 1)&~1);
//		for (i = 0; i < s; i++) {
//			size_t len2;
//			const char *name = fz_separation_name(ctx, seps, i);
//			char text[32];
//			if (name == NULL)
//			{
//				fz_snprintf(text, sizeof text, "Spot%d", i-4);
//				name = text;
//			}
//			len2 = strlen(name);
//			if (len2 > 255)
//				len2 = 255;
//			fz_write_byte(ctx, out, (unsigned char)len2);
//			fz_write_data(ctx, out, name, len2);
//		}
//		if (len & 1)
//		{
//			fz_write_byte(ctx, out, 0);
//		}
//
//		/* DisplayInfo - Colors for each spot channel */
//		fz_write_data(ctx, out, ressig, 4);
//		fz_write_int16_be(ctx, out, 0x03EF);
//		fz_write_int16_be(ctx, out, 0); /* PString */
//		fz_write_int32_be(ctx, out, 14 * s); /* Length */
//		for (i = 0; i < s; i++) {
//			float cmyk[4];
//			fz_separation_equivalent(ctx, seps, i, cs_cmyk, cmyk, NULL, fz_default_color_params);
//			fz_write_int16_be(ctx, out, 02); /* CMYK */
//			/* PhotoShop stores all component values as if they were additive. */
//			fz_write_int16_be(ctx, out, 65535 * (1-cmyk[0]));/* Cyan */
//			fz_write_int16_be(ctx, out, 65535 * (1-cmyk[1]));/* Magenta */
//			fz_write_int16_be(ctx, out, 65535 * (1-cmyk[2]));/* Yellow */
//			fz_write_int16_be(ctx, out, 65535 * (1-cmyk[3]));/* Black */
//			fz_write_int16_be(ctx, out, 0); /* Opacity 0 to 100 */
//			fz_write_byte(ctx, out, 2); /* Don't know */
//			fz_write_byte(ctx, out, 0); /* Padding - Always Zero */
//		}
//	}
//
//	/* ICC Profile - (size + 19)&~1 bytes */
//	if (size != 0)
//	{
//		/* Image Resource block */
//		fz_write_data(ctx, out, ressig, 4);
//		fz_write_int16_be(ctx, out, 0x40f); /* ICC Profile */
//		fz_write_data(ctx, out, "\x07Profile", 8); /* Profile name (must be even!) */
//		fz_write_int32_be(ctx, out, (int)size);
//		fz_write_data(ctx, out, data, size); /* Actual data */
//		if (size & 1)
//			fz_write_byte(ctx, out, 0); /* Pad to even */
//	}
//
//	/* Image resolution - 28 bytes */
//	fz_write_data(ctx, out, ressig, 4);
//	fz_write_int16_be(ctx, out, 0x03ED);
//	fz_write_int16_be(ctx, out, 0); /* PString */
//	fz_write_int32_be(ctx, out, 16); /* Length */
//	/* Resolution is specified as a fixed 16.16 bits */
//	fz_write_int32_be(ctx, out, writer->super.xres);
//	fz_write_int16_be(ctx, out, 1); /* width:  1 --> resolution is pixels per inch */
//	fz_write_int16_be(ctx, out, 1); /* width:  1 --> resolution is pixels per inch */
//	fz_write_int32_be(ctx, out, writer->super.yres);
//	fz_write_int16_be(ctx, out, 1); /* height:  1 --> resolution is pixels per inch */
//	fz_write_int16_be(ctx, out, 1); /* height:  1 --> resolution is pixels per inch */
//
//	/* Layer and Mask Information Section */
//	fz_write_int32_be(ctx, out, 0);
//
//	/* Image Data Section */
//	fz_write_int16_be(ctx, out, 0); /* Raw image data */
//}
//
//static void
//psd_invert_buffer(unsigned char *buffer, int size)
//{
//	int k;
//
//	for (k = 0; k < size; k++)
//		buffer[k] = 255 - buffer[k];
//}
//
//static void
//psd_write_band(fz_context *ctx, fz_band_writer *writer_, int stride, int band_start, int band_height, const unsigned char *sp)
//{
//	psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
//	fz_output *out = writer->super.out;
//	int y, x, k, finalband;
//	int w, h, n;
//	unsigned char buffer[256];
//	unsigned char *buffer_end = &buffer[sizeof(buffer)];
//	unsigned char *b;
//	int plane_inc;
//	int line_skip;
//	int num_additive = writer->num_additive;
//
//	if (!out)
//		return;
//
//	w = writer->super.w;
//	h = writer->super.h;
//	n = writer->super.n;
//
//	finalband = (band_start+band_height >= h);
//	if (finalband)
//		band_height = h - band_start;
//
//	plane_inc = w * (h - band_height);
//	line_skip = stride - w*n;
//	b = buffer;
//	if (writer->super.alpha)
//	{
//		const unsigned char *ap = &sp[n-1];
//		for (k = 0; k < n-1; k++)
//		{
//			for (y = 0; y < band_height; y++)
//			{
//				for (x = 0; x < w; x++)
//				{
//					int a = *ap;
//					ap += n;
//					*b++ = a != 0 ? (*sp * 255 + 128)/a : 0;
//					sp += n;
//					if (b == buffer_end)
//					{
//						if (k >= num_additive)
//							psd_invert_buffer(buffer, sizeof(buffer));
//						fz_write_data(ctx, out, buffer, sizeof(buffer));
//						b = buffer;
//					}
//				}
//				sp += line_skip;
//				ap += line_skip;
//			}
//			sp -= stride * (ptrdiff_t)band_height - 1;
//			ap -= stride * (ptrdiff_t)band_height;
//			if (b != buffer)
//			{
//				if (k >= num_additive)
//					psd_invert_buffer(buffer, sizeof(buffer));
//				fz_write_data(ctx, out, buffer, b - buffer);
//				b = buffer;
//			}
//			fz_seek_output(ctx, out, plane_inc, SEEK_CUR);
//		}
//		for (y = 0; y < band_height; y++)
//		{
//			for (x = 0; x < w; x++)
//			{
//				*b++ = *sp;
//				sp += n;
//				if (b == buffer_end)
//				{
//					fz_write_data(ctx, out, buffer, sizeof(buffer));
//					b = buffer;
//				}
//			}
//			sp += line_skip;
//		}
//		if (b != buffer)
//		{
//			fz_write_data(ctx, out, buffer, b - buffer);
//			b = buffer;
//		}
//		fz_seek_output(ctx, out, plane_inc, SEEK_CUR);
//	}
//	else
//	{
//		for (k = 0; k < n; k++)
//		{
//			for (y = 0; y < band_height; y++)
//			{
//				for (x = 0; x < w; x++)
//				{
//					*b++ = *sp;
//					sp += n;
//					if (b == buffer_end)
//					{
//						if (k >= num_additive)
//							psd_invert_buffer(buffer, sizeof(buffer));
//						fz_write_data(ctx, out, buffer, sizeof(buffer));
//						b = buffer;
//					}
//				}
//				sp += line_skip;
//			}
//			sp -= stride * (ptrdiff_t)band_height - 1;
//			if (b != buffer)
//			{
//				if (k >= num_additive)
//					psd_invert_buffer(buffer, sizeof(buffer));
//				fz_write_data(ctx, out, buffer, b - buffer);
//				b = buffer;
//			}
//			fz_seek_output(ctx, out, plane_inc, SEEK_CUR);
//		}
//	}
//	fz_seek_output(ctx, out, w * (band_height - h * (int64_t)n), SEEK_CUR);
//}
//
//static void
//psd_write_trailer(fz_context *ctx, fz_band_writer *writer_)
//{
//	psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
//	fz_output *out = writer->super.out;
//
//	(void)out;
//	(void)writer;
//}
//
//static void
//psd_drop_band_writer(fz_context *ctx, fz_band_writer *writer_)
//{
//	psd_band_writer *writer = (psd_band_writer *)(void *)writer_;
//
//	(void)writer;
//}
//
//fz_band_writer *fz_new_psd_band_writer(fz_context *ctx, fz_output *out)
//{
//	psd_band_writer *writer = fz_new_band_writer(ctx, psd_band_writer, out);
//
//	writer->super.header = psd_write_header;
//	writer->super.band = psd_write_band;
//	writer->super.trailer = psd_write_trailer;
//	writer->super.drop = psd_drop_band_writer;
//
//	writer->num_additive = 0;
//
//	return &writer->super;
//}
//
//static fz_buffer *
//psd_from_pixmap(fz_context *ctx, fz_pixmap *pix, fz_color_params color_params, int drop)
//{
//	fz_buffer *buf = NULL;
//	fz_output *out = NULL;
//
//	fz_var(buf);
//	fz_var(out);
//
//	fz_try(ctx)
//	{
//		buf = fz_new_buffer(ctx, 1024);
//		out = fz_new_output_with_buffer(ctx, buf);
//		fz_write_pixmap_as_psd(ctx, out, pix);
//		fz_close_output(ctx, out);
//	}
//	fz_always(ctx)
//	{
//		if (drop)
//			fz_drop_pixmap(ctx, pix);
//		fz_drop_output(ctx, out);
//	}
//	fz_catch(ctx)
//	{
//		fz_drop_buffer(ctx, buf);
//		fz_rethrow(ctx);
//	}
//	return buf;
//}
//
//fz_buffer *
//fz_new_buffer_from_image_as_psd(fz_context *ctx, fz_image *image, fz_color_params color_params)
//{
//	fz_pixmap *pix = fz_get_pixmap_from_image(ctx, image, NULL, NULL, NULL, NULL);
//	return psd_from_pixmap(ctx, pix, color_params, 1);
//}
//
//fz_buffer *
//fz_new_buffer_from_pixmap_as_psd(fz_context *ctx, fz_pixmap *pix, fz_color_params color_params)
//{
//	return psd_from_pixmap(ctx, pix, color_params, 0);
//}
